In the implementation of PWM control function, two instances cannot be created

RE: In the implementation of PWM control function, two instances cannot be created

Simonr — Mon, 07 Feb 2022 08:11:59 GMT

Glad to hear we found the cause of this first issue at least.

Are you working on a development kit or a custom board here? I don't see why the duty cycle set for your LEDs should only affect one of them. How do you enable the working LEDs exactly versus how you're enabling the problematic one?

Best regards,

Simon

RE: In the implementation of PWM control function, two instances cannot be created

LemonCake — Fri, 04 Feb 2022 03:54:49 GMT

app_pwm_channel_duty_set(&PWM0, 0, duty_ratio);
app_pwm_channel_duty_set(&PWM1, 0, duty_ratio);

Thank you very much for your answer. From your answer, I changed TIMER2 to TIMER3 and changed "NRFX_TIMER3_ENABLED" and "TIMER3_ENABLED" in app_config.h. and created the second instance. Then the error disappeared and the build succeeded. When I set the duty ratio for the two LED channels as in the first program, the duty ratio changed only for one LED and not for the other.
By the way, the LED whose duty ratio did not change is enabled by using "pwm_utils_enable()" as initialization process. If this function is set for multiple LEDs, both LEDs will not light up, so it is not possible to set the same function for multiple LEDs.
If you have any suggestions on how to fix this, please let me know.
Thank you very much.

LemonCake

RE: In the implementation of PWM control function, two instances cannot be created

Simonr — Wed, 02 Feb 2022 12:41:08 GMT

From the "multiple definition" error message you're seeing it seems like you're trying to use the TIMER2 instance multiple times in your application. I think the Mesh stack uses this timer instance already, so trying to add it in your application is likely what's causing this issue. Since you're working on the nRF52840, there should be more than enough TIMER instances (5) to go around, so try using another one for your application.

Best regards,

Simon